KR101145418B1 - A light emitting device module with waterproof function and a plane light source apparatus using the same - Google Patents

Abstract

PURPOSE: A light element module equipped with a waterproof function and a surface light source device using the same are provided to effectively eliminate heat created due to the use of the light element module by including a heat radiation plate between the light element module and a frame. CONSTITUTION: A light element(200) is combined to the center of the upper side of a substrate(100). Housing(300) forms an internal space with the substrate. The internal space is composed of a first internal space and a second internal space. The first internal space is close to the light element and the second internal space is far from the light element. A wire fixation groove(330) fixing a wire(110) is formed in the housing. A waterproof member(500) is included in the internal space in order to prevent a light element module to leak. A light control unit(400) controls the output of light created in the light element.

Description

Optical device module with waterproof function and surface light source device using the same {A Light Emitting Device Module With Waterproof Function and A Plane Light Source Apparatus Using the Same}

The present invention relates to an optical device module having a waterproof function and a surface light source device using the same, and more particularly, to a light emitting device having excellent waterproofness and a wide range of direct angles and excellent durability and economical efficiency.

Recently, light emitting diodes (LEDs) are driven with low power consumption and have low heat generation, and thus are used as light sources in various technical fields. Many efforts have been made to realize illumination with uniform brightness with a small difference in contrast using LEDs, which are point sources. In addition, efforts are being made to make durable LEDs that can be used stably for a long time regardless of indoor or outdoor.

Accordingly, Korean Patent Publication No. 10-2010-0127895 minimizes the components and easily implements the coupling between the components. However, the waterproof silicon is formed on the top to block the exposure of the electrical connection to the outside to increase durability. It was.

However, the present invention was not provided with a lens for light diffusion on the top of the LED chip to emit light in a narrow range of light efficiency was inferior. In addition, even in a light emitting device having a conventional light diffusion lens, the light directing angle with respect to the light emitting member is only about 120 °, and light is concentrated around the optical axis A, so that smooth light dispersion is achieved even within the range of the directing angle. There was a problem not to lose.

In addition, when waterproof silicone was applied and formed on the LED chip as it was, it was not possible to effectively cool the heat generated by the use of the LED. This causes a problem that rather hinders the durability of the LED module.

In addition, in the case of forming the waterproof silicon on the LED chip, it had to be formed of a transparent material so that the light generated from the LED chip can pass. This results in a light uniformity depending on the coating thickness, the coating uniformity of the waterproof silicone, or the degree of inclusion of impurities in the silicone. This has a problem in that the light quality of the LED module cannot be kept constant.

Accordingly, the present invention has been made to solve the above problems, it is provided with a waterproof member in the inner space between the housing and the substrate having a waterproof function that can prevent a short circuit due to moisture or water contained in the air. An optical device module and a surface light source device using the same are provided.

In addition, the optical control unit is coupled to the upper surface of the housing to implement a wide range of light directing angle (165 °) of the optical device, and provides an optical device module having a waterproof function that can achieve a light uniformity through the depression and the surface light source device using the same There is.

In addition, by providing a heat sink between the optical device module and the frame to provide an optical device module having a waterproof function that can effectively remove the heat generated by the use of the optical device module and a surface light source device using the same.

The problem to be solved of the present invention is not limited to those mentioned above, other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Means for achieving the object of the present invention, the plate-shaped substrate; An optical device coupled to the top surface of the substrate; A housing coupled to the top surface of the substrate to receive the optical device and forming an inner space together with the substrate; An optical control unit coupled to an upper surface of the housing to control the emission of light generated from the optical device; And an inner space divided into a first inner space close to the optical element and a second inner space far from the optical element, and include a waterproof member provided in the second inner space.

In addition, the packing member is further provided at a boundary between the first inner space and the second inner space.

In addition, the light control unit is made of a hemispherical shape, the emission surface light emitted from the optical element is emitted to the outside; A receiving portion having a flat portion formed flat on the lower end of the emission surface, the receiving portion being formed in the center region of the flat portion to accommodate the optical element; And a depression formed downwardly in the emission surface region adjacent to the optical axis from which the light generated from the optical element is straight out.

In addition, the substrate further includes a wire electrically connected to receive power, and the connection portion between the wire and the substrate is positioned inside the waterproof member.

In addition, one side of the wire is characterized in that the fuse is further provided to block the overcurrent.

In addition, the emission surface is characterized in that the angle between the direction of emitting light of maximum intensity from the optical element and the direction of emitting light that is half of the maximum intensity is characterized in that the 82.5 °.

In addition, a plate-shaped substrate, an optical element coupled to the upper end surface of the substrate, a housing coupled to the upper side to accommodate the optical element, and a housing forming an internal space with the substrate, coupled to the upper end of the housing to control the emission of light generated from the optical element The optical control unit and the internal space is divided into a first internal space close to the optical device and a second internal space far from the optical device, a plurality of optical device module including a waterproof member provided in the second internal space; A frame accommodating a plurality of optical device modules; It is characterized in that it comprises a wire for supplying power by connecting the optical device modules.

In addition, one side of the wire is characterized in that the fuse is further provided to block the overcurrent.

In addition, a heat sink is further provided between the optical device module and the frame.

According to the present invention, the waterproof member is provided in the inner space between the housing and the substrate to prevent a short circuit caused by moisture or water contained in the air, thereby providing stable use indoors and outdoors.

In addition, the optical control unit is coupled to the upper surface of the housing to implement a wide and uniform light directivity angle (165 °) of the optical device can realize the same brightness as the conventional light emitting device even if using a small number of optical device modules, There is an effect that can achieve a smooth light dispersion in which no dark portion is formed within the range of light directivity angle.

In addition, by providing a heat sink between the optical device module and the frame can effectively remove the heat generated by the use of the optical device module has the effect of increasing the stability and durability.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a perspective view of an optical device module according to the present invention.
2 is an exploded perspective view of an optical device module according to the present invention.
3 is a front sectional view, a plan view and a rear view of an optical device module according to the present invention.
4 is a front view and a plan view of an optical control unit of the optical device module according to the present invention.
5 is a front view of the surface light source device according to the present invention.
6 is a partially exploded perspective view of the surface light source device according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration of an optical device module having a waterproof function and a surface light source device using the same according to a preferred embodiment of the present invention.

(Optical device module)

1 is a perspective view of an optical device module according to the present invention, Figure 2 is an exploded perspective view of the optical device module according to the invention, Figure 3 is a front sectional view, a plan view and a bottom view of the optical device module according to the invention, 4 is a front view and a plan view of the light control unit of the optical device module according to the present invention.

The optical device module 10 having a waterproof function according to the present invention can implement a wide and uniform light directivity, achieve a smooth light dispersion, and implements an optical device module 10 having excellent waterproof function. .

1 to 4, the optical device module 10 having a waterproof function according to the present invention is approximately the substrate 100, the optical device 200, the housing 300, the light control unit 400 and It may be made to include a waterproof member 500.

First, the substrate 100 is formed of a plate-shaped member to form a lower region of the optical device module 10. An upper surface of the substrate 100 is provided with an area in which the optical device 200 is installed, and wiring is formed to supply driving power to the optical device 200. At this time, the wiring (not shown) may be made of a thin wire, but it is preferable to provide a driving power by forming a printed circuit (PCB).

And the electrical connection between the wiring formed on the substrate 100 and an external power source (not shown) is connected through the wire 110, the series and parallel connection between the plurality of optical device modules 10, and also the wire 110 Is done through. In this case, the electrical connection between the wire 110 and the substrate 100 may be formed by soldering or the like.

In addition, one side of the wire 110 may be provided with a fuse 120 to block the overcurrent. By providing the fuse 120 as described above, it is possible to prevent excessive current that exceeds a predetermined value from flowing continuously. Therefore, stable optical device module 10 can be operated.

In the embodiment of the present invention, the wire 110 is formed of a silicon material so that the mutual bonding force is increased when the waterproof member 500 is described below.

On the other hand, the substrate 100 may be equipped with a device for smoothing or stepping down the input power source, a device for rectifying the power source, a resistor or a capacitor for the stable operation of the optical device 200.

In the case where the substrate 100 is formed of a printed circuit board (PCB), the plate-shaped member serving as the base material of the substrate 100 is made of aluminum having a high thermal conductivity, and thus heat generated due to the use of the optical device 200 is obtained. It is desirable to be able to release well to the outside.

The optical device 200 is a light emitter for generating light, and the optical device 200 according to the present invention may use an LED which is a semiconductor device that emits light by passing a current through a compound such as gallium arsenide. The optical device 200 is coupled to the top surface of the substrate 100 on which the wiring is formed to receive driving power from an external power source to generate light.

The housing 300 is a component constituting the appearance of the optical device module 10 according to the present invention, and is positioned above the substrate 100. The housing 300 may be formed in a tubular shape of which the lower side is open. The lower opening of the housing 300 may be larger than the size of the substrate 100 to accommodate the optical device 200, the substrate 100, and the like in the internal space 310 of the housing 300.

The housing 300 accommodates the substrate 100, but is coupled to the top surface of the substrate 100 while being spaced apart from each other. As a result, a constant internal space 310 is formed between the inner surface of the housing 300 and the substrate 100. At this time, the coupling method between the housing 300 and the upper surface of the substrate 100 may be a method of fastening at least two symmetrical points using the screw 350.

On the other hand, at least one of the housing 300 and the substrate 100 may be formed with a wire fixing groove 330 in a position where the wire 110 is connected to support and fix the wire 110.

The housing 300 may be made of any material as long as it can be molded into a shape that can accommodate the optical device 200 and the substrate 100. However, in the embodiment of the present invention, the housing 300 is manufactured of a synthetic resin made of a transparent material that can transmit light.

Light control unit 400 is a component that diffuses the light by controlling the emission of the light generated from the optical device 200, the light generated from the optical device 200 passes through the light control unit 400 in a wide range of a predetermined range And have a uniform light directivity angle. The light control unit 400 is to determine the characteristics of the light emitted is a part that can be variously modified according to the purpose and use of the optical device 200.

Light control unit 400 according to the present invention is coupled to the upper surface of the housing 300, is formed integrally with the housing 300, or manufactured separately in the coupling hole 320 formed in the housing 300 It can be formed in a fitted manner. The light control unit 400 formed as described above is positioned above the optical device 200.

Looking at the shape of the light control unit 400 in detail, it may be formed of approximately the exit surface 410, the planar portion 420, the receiving portion 430 and the depression 440.

The exit surface 410 is a surface from which light passing through the light control unit 400 exits toward an illuminated member (not shown in FIG. 4A), which is the front surface as shown in FIG. 4A. It is made in a hemispherical shape on the figure, it may be implemented in a circular shape on the top view as shown in (b) of FIG. The shape of the hemispherical emission surface 410 is deformed according to the change in the radius of curvature of the emission surface 410 so that the light emitted radially from the optical element 200 located below has various directivity angles with respect to the illuminated member. .

The curvature of the emission surface 410 in the embodiment of the present invention is the angle between the direction of emitting light of maximum intensity from the optical device 200 (optical axis: A) and the direction of emitting light of half the maximum intensity (B). (θ1) is formed to be approximately 82.5 ° (when the light control portion is formed of a transparent resin material having a refractive index of n = 1.49). For this reason, the light directing angle emitted by the optical element 200 with respect to the lighted member is 165 ° as a whole, and is clearly distinguished from the light directing angle of the conventional light emitting device.

In this case, as shown in FIG. 4, the optical axis A may be referred to as a propagation direction of light, which may be located at the center among a myriad of light emitted radially from the optical device 200, and also from the optical device 200. It can be said that the generated light goes straight out (i.e., the direction of emitting light of maximum intensity).

The accommodating part 430 is a component provided to accommodate the optical device 200. The accommodating part 430 is formed in the center area of the planar part 420 connected to the emission surface 410 to form the lower end of the light control part 400. The receiving part 430 is formed in a shape corresponding to the shape of the optical device 200 to accommodate the optical device 200.

On the other hand, the flat portion 420 may be formed to be in close contact with the substrate 100, it is preferable to be spaced apart from the substrate 100 so that the heat radiation through the internal space is made. At this time, the packing member 330 to be described below is installed between the flat portion 420 and the substrate 100 so that the waterproof member 500 is not filled in the internal space in which the optical device 200 is located.

The depression 440 has a lower side with respect to the optical axis A in order to reduce the amount of emitted light in the direction of the optical axis A (the direction of emitting light of maximum intensity) and to increase the amount of the emitted light far from the optical axis A. It is a component formed concave. The shape of the recessed portion 440 reduces the difference between the amount of light in the direction of the optical axis A and the amount of light at a position far from the optical axis A to emit light having a uniform brightness to the illuminated member.

The curvature of the depression 440 and the site angle θ2 from the optical axis A may be variously modified within a range that does not prevent the realization of a wide range of direct angles and uniform luminance.

However, the recessed portion 440 in the embodiment of the present invention is formed in a range in which the angle θ2 from the optical axis A is approximately 16 ° each to the left and right. That is, the depression 440 is formed concave downward in the range of curvature that does not prevent the realization of a wide range of light directivity and uniform brightness within the range of 32 ° to the left and right in the state centering on the optical axis A. will be.

The outgoing light passing through the light control unit 400 illuminates the illuminated member at a wide and uniform light directing angle, and achieves a smooth light dispersion in which no dark portion is formed.

On the other hand, the light control unit 400 is formed of a material that can transmit light well. Specifically, it may be formed of a transparent resin material such as PMMA (methyl methacrylate), PC (polycarbonate), EP (epoxy resin) or transparent glass.

The waterproof member 500 is a component for preventing the optical device module 10 from shorting due to moisture or water contained in the air. The waterproof member 500 is provided in the internal space 310 formed by the housing 300 and the substrate 100. It is provided.

In detail, the internal space 310 may be divided into a first internal space 312 and a second internal space 314. Here, the first inner space 312 refers to an inner space formed in an area close to the optical device 200, that is, a space formed by the light control unit 400 and the substrate 100 adjacent to each other.

In addition, the second inner space 314 may be formed by adjoining the housing 300 and the substrate 100 in an inner space formed in a region far from the optical device 200, that is, in an area other than the first inner space 312. Say space.

In this case, the waterproof member 500 may be provided with the waterproof member 500 in both the first and second internal spaces 312 and 314 as long as the waterproof member 500 is within a range that does not prevent the light output of the optical device 200. However, in the exemplary embodiment of the present invention, the waterproof member 500 is formed only in the second inner space 314 to radiate heat generated by the light output of the optical device 200 smoothly.

The waterproof member 500 first combines the housing 300 and the substrate 100 and then fills the waterproof member 500 such as epoxy or silicon in a liquid state through the internal spaces 310 and 314 shown in FIG. It can be formed by the method of hardening. In this case, a transparent material may be used to increase light efficiency by including reflective particles.

Alternatively, the shape corresponding to the internal space 310 may be manufactured by using a waterproof member 500 such as a soft synthetic resin in advance and positioned between the housing 300 and the substrate 100 and then coupled to each other. However, in order to effectively waterproof, it is preferable to fill a liquid waterproof member 500 in the internal space 310.

Meanwhile, the packing member 330 is disposed at the boundary between the first inner space 312 and the second inner space 314 to prevent the liquid waterproof member 500 from flowing into the first inner space 312. It can be provided. The packing member 330 is positioned between the substrate 100 and the light control unit 400.

The electrical connection between the wire 110 and the substrate 100 formed by soldering or the like is located inside the waterproof member 500 such that the wire 110 is not exposed to moisture or water contained in the air. Therefore, the short circuit of the optical device module 10 may be completely prevented.

( Surface light source device )

5 is a front view of the surface light source device according to the present invention, Figure 6 is a partially exploded perspective view of the surface light source device according to the present invention.

5 and 6, the surface light source device 1 according to the present invention includes a plurality of optical device modules 10, a frame 20, a wire 110, a heat sink 30, and the like. Can be done.

Since the optical device module 10 and the wire 110 used in the surface light source device 1 are the same as those described in the above "optical device module", a structure other than the configuration and the plurality of optical device modules 10 will be described below. The description of the connection between the two will be described.

First, in the surface light source device 1 according to the present invention, a plurality of optical device modules 10 are used. As shown in FIG. 5, the six optical device modules 10 are connected in series to form an upper end, and the surface light source device 1 having the same number of optical device modules 10 is arranged in parallel with the middle and lower ends thereof. Can be formed.

However, if necessary, the optical device module 10 may be zigzag-shaped such that the upper optical device modules 10 are positioned between the intermediate optical device modules 10 for more efficient operation of the optical device module 10. It may be desirable to deploy.

In the embodiment of the present invention, the distance between the optical device modules 10 used in the surface light source device 1 is approximately 24 cm in consideration of the technical characteristics of the optical device module 10 having a wide and uniform directing angle. . As a result, even if a small number of optical device modules 10 are used, the same brightness can be realized, and smooth light dispersion without dark parts is achieved.

The frame 20 is a component provided with an inner space capable of accommodating the plurality of optical device modules 10 and protects the plurality of optical device modules 10 from external impact. In addition, the plurality of optical device modules 10 serves to primarily prevent the exposure to water or water vapor.

The frame 20 may be manufactured in various sizes according to the purpose of use, and the material may be formed of a metal capable of reflecting light, or may be subjected to light reflection by applying a reflective paint to an inner surface thereof. By forming the frame 20 to reflect the emitted light as described above, even light emitted in a direction other than the light directing angle may be illuminated to reflect the light to be illuminated. Therefore, the optical efficiency of the optical device module 10 is increased.

In the surface light source device 1 according to the present invention, the wire 110 is a component provided for electrical connection between the optical device module 10 and electrical connection between the external power source and the optical device module 10. External power is supplied to the surface light source device (1) through.

A fuse 120 may be provided at one side of the wire 110 to block an overcurrent. Since the surface light source device 1 includes a plurality of optical device modules 10, a fuse 120 may be provided for each optical device module 10. Can be installed.

However, in the embodiment of the present invention, one fuse 120 is installed in each of the three optical device modules 10 so that the surface light source device 1 can be smoothly operated while achieving stability of overcurrent protection.

The heat sink 30 is a component provided to dissipate heat generated by the use of the optical device module 10 to the outside, is formed in the interior space of the frame 20, the light on the upper surface of the heat sink 30 The device module 10 is seated.

The heat sink 30 may be formed long along the length or width direction of the frame 20 or individually formed in each region in which the optical device module 10 is located so that the optical device module 10 may be seated.

The heat dissipation plate 30 may serve as a heat dissipation fin by forming protrusions or grooves formed in the length or width direction of the heat dissipation plate 30 on the upper surface adjacent to the optical device module 10 to increase the heat dissipation efficiency. On the other hand, the heat sink 30 is preferably formed of a material such as aluminum having good thermal conductivity.

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1: surface light source device 10: optical device module
20: frame 30: heat sink
100: substrate 110: wire
120: fuse 200: optical element
300: housing 310: internal space
312: first internal space 314: second internal space
320: coupling hole 330: packing member
340: wire fixing groove 350: screw
400: light control unit 410: exit surface
420: plane portion 430: accommodation portion
440: depression 500: waterproof member
A: optical axis (direction of emitting light of maximum intensity)
B: Direction of exiting light at half the maximum intensity

Claims (9)

A substrate having a plate shape;
An optical element coupled to a center of an upper surface of the substrate;
A housing coupled to an upper surface of the substrate to accommodate the optical device and forming an inner space together with the substrate;
An optical control unit coupled to an upper surface of the housing to control the emission of light generated from the optical device; And
The inner space is divided into a first inner space corresponding to the light control unit and a second inner space surrounding the first inner space, and includes a waterproof member provided in the second inner space,
The light control unit,
An emission surface which is made of a hemispherical shape and the light generated from the optical element is emitted to the outside;
A flat part formed at a lower end of the exit surface, the flat part being formed in a central area of the flat part and accommodating the optical element; And
And a depression formed concave downward in the emission surface area adjacent to the optical axis from which the light generated by the optical device is straight out.
The method of claim 1,
The optical device module having a waterproof function, characterized in that the packing member is further provided at the boundary between the first inner space and the second inner space.
delete The method according to claim 1 or 2,
The substrate further includes a wire electrically connected to receive power, and the connection portion between the wire and the substrate is positioned within the waterproof member.
The method of claim 4, wherein
One side of the wire is an optical device module having a waterproof function, characterized in that the fuse is further provided to block the overcurrent.
The method of claim 1,
The emission surface is an optical element module having a waterproof function, characterized in that the angle between the direction of emitting light of the maximum intensity from the optical element and the direction of emitting light that is half of the maximum intensity is 82.5 °.
A plurality of optical device modules;
A frame accommodating the plurality of optical device modules; And
It includes a wire for supplying power by connecting the optical device modules with each other,
Each of the plurality of optical device modules includes a substrate; An optical element coupled to a center of an upper surface of the substrate; A housing coupled to an upper surface of the substrate to accommodate the optical device and forming an inner space together with the substrate; An optical control unit coupled to an upper surface of the housing to control the emission of light generated from the optical device; And the inner space is divided into a first inner space corresponding to the light control unit and a second inner space surrounding the first inner space, and includes a waterproof member provided in the second inner space.
The light control unit comprises a hemispherical light emitting surface for emitting light generated from the optical device to the outside; A flat part formed at a lower end of the exit surface, the flat part being formed in a central area of the flat part and accommodating the optical element; And a depression formed downwardly in the emission surface area adjacent to the optical axis from which the light emitted from the optical element is straight out.
The method of claim 7, wherein
Surface light source device characterized in that the one side of the wire is further provided with a fuse for blocking the overcurrent.
The method of claim 7, wherein
Surface heat source device characterized in that the heat sink is further provided between the optical element module and the frame.

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